Insulator for electrically-charged wires.



S. J. CONRAD.

INSULATOR FOR ELEGTRIGALLY CHARGED WIRES.

APPLICATION FILED JULY 17, 1908.

912,364. Patented Feb. 16. 1909 1M, Cumi- STONEWALL- JACKSON CONRAD,creams RAPIDS, IOWA. momma. ron mcrmcmx-cmenn wmns.

g No. 912,364.

Specification Letters Patent.

PatentedFeb. 16, 1909.

Application filed M 17, 1908. Serial 80. 444,137.

To all whom it may concern: 7

Be it known that I, Sromwam. JACKSON Comm), a citizen of the UnitedStates, residing at Cedar Rapids, in the county of Linn and State ofIowa, have invented a new and useful Insulator for Electrically- Char edWires, of which. the following is a speci cation.

My invention relates to im rovements in insulating devices forelectrlcally charged wires, and the object is to sulator that shall beespecia ly adapted to be used in positions where they are surrounded bywood or other inflammable material and the object is to" form aninsulator and install it in the inflammable surroundings in such amanner that there will be little or no danger from theinsulator-becoming loose or disengaged from the surrounding material.

and will keep the electric wire from coming in contact with anythingexcept the insulator.

It consists in forming a recess or depres sion in the outside of aninsulator preferably tubular and inserting in that recess aspring catchadapted to engage the insulator and the surrounding material and preventthe removal of the insulator.

The following specification, when taken in connection with the drawingsaccompanyingl. the same and forming a part hereof, wi point out indetail'the manner of construction and mode of operation whereby theobjects sought may be accomplished.

Figure 1 is a pers ective view of an insulator in position in a b ock ofwood. Fig. 2 is a perspective view of the insulator removed. Fig. 3 is aperspective view of the insulator removed and the spring catch placed inposition. Fig. 4 is a side view of the spring catch shown in Fig. 3.

Referrin to the drawings, 2 represents the body 0 the insulator, whichis provided with a shoulder 4 and a hole 5 longitudinally therethrough,in which the electric wires 7 are located, and is preferably made ofclay but may be of any electrical non-conducting material. In one sideof the insulator is formed a recess 6which for convenience extends fromthe inner side 8 of the shoulder 4, a short distance along the bodyvarying according to the len h of the insulator and according to theosltion the insulator occupics in the buil ing. In this recess 6 isrovlde an inplaced a spring 10 shown in Figs. 3 and 4 which pro erablyconsists of two members 12 and 14. The member 12 is preferably afiat-piece of spring steel of about the length, width and thickness ofthe recess 6 and curved slightly upward. The member 14 is also formed ofspring steel and is somewhat shorter and terminates in points 15 or thepoints may be dispensed with and the outer end turned upward but Iprefer the points. These two members 12 and 14 are united to ether byrivets 16.

These insulators are used in installing electric 1i ht wires inbuildings for which purposes holes are bored through the joist andpartitions of buildings and the insulators inserted therethrough.

The foregoing description shows my insulator as insertedthrough anopening in a block of wood but it is the same where used in connectionwith a building, joist or partition.

The mode of using this insulator is by making an opening through thejoist or artition in which the electric wire is to be installed. Thenthe spring 10 is placed in the recess 6 with one of the ends of themember.12 nearly in contact with the shoulder 4 at 8 and the other onein engagement with the rear end of the recess. The insulator with thespring, is then inserted through the hole in the joist or partition. Asthe hole is nearly of the same size as the diameter of the body of theinsulator the member 14 of the spring will be compressed down nearlyinto the recess6. The insulator is forced in until the shoulder comesagainst the face of the opening in the partition and the electric wireis inserted through the hole in the insulator. As soon as the insulatoris inserted the member 14 will come into action and engage the innersurface of the openin in the partition and prevent any remova of theinsulator. Then the electric wire may be readily inserted in the usualmanner through the opening. 5 in the insulator.

It will be observed that there will be no reasonable possibility of theinsulator becoming loose or dislodged from the opening whereby fires arefrequently caused as the engagement of the spring with the rear of therecess will keep the insulator in a given place with the shoulder-incontact with the surroundings.

Having now described my invention what I claim is p,

1. In. an insulatona body formed of clay and provided with a'recess inthe body, and a spring in the recess, consisting of two members onemember adapted to engage both ends of the recess, and the other memberadapted to enga e the surroundings of the body of the insu 'atorwhen-the insulator. is in position. 4 i v 2.'1n an insulator atubularbody formed of clay, a shoulder on one end of the body,

a rectangular recess extending longitudi- .in the outer surface of thebody,

nally alon and a flat eaf sprin consisting of two members one memberadapted to enga the inner ends of the recess and the ot er member adated to engage the surroundings of the insu ator and with the shoulderprevent the removal of the insulator in either direc tion.

3. In an insulator, a body formed of clay having an opening therethroughand revided with a rectangular recess exten in along in the outersurface of the body, an a spring consisting of two members, one ada tedto engage the ends. of the recess in the ody of the insulator and theother memerases ber to-engage the surroundings of the insulator and holdthe same in a given position in its surroundings. g

4, In an insulator, a body provided with a recess, and longitudinalopening therethrough, incombination with a sprmg composed of two membersunited together, one member engaging the roundings in which theinsulator is inserted and prevent the same from removal therefrom.

5. An insulator consisting of a circular body of the insulator n therecess and the other member provided -w1th a catch adapted to engage thesurbody with an opening therethrough, a rectangular recess in said body,a shoulder there on, 'a sprmg composed of two member's united together,one member adapted to fit into said recess, the other member bentoutwardly from the first member and having a catch thereon adapted toengage the inside of the surroundings of the insulator and prevent itsremoval.

STONEWALL JACKSON CONRAD.

Witnesses: r .W. R. Asnronn,

M. M. Knees.

